yeah word of warning i tried a US theme it installed and bugged my theme menu, i couldn't access it even after uninstalling so i needed to restore my emunand so just be careful it may of just been a bug idk

you can INSTALL the cia, but it won't work. the title code is different.
i tried installing two japanese themes on my eur 3ds, but i got nowhere, some clever people tried to help but still had problems...
the title code for eur themes is CTR-M-HMMP-00, for japan it's CTR-M-HMMJ-00... editing the files and changing to the region you want, and rebuilding the cia does not seem to work. - changing the unique id does not seem to help either...
i'm sure the same region will work fine, but yes, at the moment it's tricky to have cross region themes working.
i would like to have my japanese exclusive thees on my eur 3ds, and my zelda eur theme on my japanese 3ds, i don't want to buy it twice

yeah word of warning i tried a US theme it installed and bugged my theme menu, i couldn't access it even after uninstalling so i needed to restore my emunand so just be careful it may of just been a bug idk

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couldn't you have deleted the other dlc in devmenu? that said, it didn't bug mine when i tried (and failed) to install other region's theme. but yeah i just deleted it from the devmenu.
i heard from someone that he got someone else's theme installed but then could not access the theme store... but the theme worked...

I'd keep an eye on 3dbrew.org/wiki/Home_Menu/Themes as it gets updated

And yeah themes are able to be dumped and repacked as a .cia, you only need SD Decryptor. Theme files look like they get put under a different directory to installed games, on mine games were under title\00040000 and the theme was under title\0004008c. Files you want should be under 0000<numbers>\content\00000000, run the .app files with their xorpads, which will give you encrypted .cfas then you

you can INSTALL the cia, but it won't work. the title code is different.
i tried installing two japanese themes on my eur 3ds, but i got nowhere, some clever people tried to help but still had problems...
the title code for eur themes is CTR-M-HMMP-00, for japan it's CTR-M-HMMJ-00... editing the files and changing to the region you want, and rebuilding the cia does not seem to work. - changing the unique id does not seem to help either...
i'm sure the same region will work fine, but yes, at the moment it's tricky to have cross region themes working.
i would like to have my japanese exclusive thees on my eur 3ds, and my zelda eur theme on my japanese 3ds, i don't want to buy it twice

themes are just dlc (weird though, i would have thought each theme would have a separate dlc entry, but no...)

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hey can you tell me where i can get cia theme for jap console. cuz my 3ds reg is jap

you can INSTALL the cia, but it won't work. the title code is different.
i tried installing two japanese themes on my eur 3ds, but i got nowhere, some clever people tried to help but still had problems...
the title code for eur themes is CTR-M-HMMP-00, for japan it's CTR-M-HMMJ-00... editing the files and changing to the region you want, and rebuilding the cia does not seem to work. - changing the unique id does not seem to help either...
i'm sure the same region will work fine, but yes, at the moment it's tricky to have cross region themes working.
i would like to have my japanese exclusive thees on my eur 3ds, and my zelda eur theme on my japanese 3ds, i don't want to buy it twice
themes are just dlc (weird though, i would have thought each theme would have a separate dlc entry, but no...)

Click to expand...

Damn, sad to hear that. The 2 Monster Hunter 4G themes are AMAZING and cheap as well, would love to use them on my US XL.

I'd keep an eye on 3dbrew.org/wiki/Home_Menu/Themes as it gets updated

And yeah themes are able to be dumped and repacked as a .cia, you only need SD Decryptor. Theme files look like they get put under a different directory to installed games, on mine games were under title\00040000 and the theme was under title\0004008c. Files you want should be under 0000<numbers>\content\00000000, run the .app files with their xorpads, which will give you encrypted .cfas then you

Or at least that's how it's worked for the two decrypted themes I've seen. Other themes might have more files, etc, I dunno, but this might be enough, at least for the themes that are available atm?

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sure, although just to be neat you should use the -dlc flag, right
as i said before, all the themes you have seemed to be in that one folder/listed under the same dlc, not separate dlc listings, so i think the more themes you have, the more .app files you will have... i think...